The quote is frequently taken out of context, the speaker of the line is Dick thr Butcher a murderous henchman to Jack Cade, a pretender to the throne.

"The first thing we do," said the character in Shakespeare's Henry VI, is "kill all the lawyers." Contrary to popular belief, the proposal was not designed to restore sanity to commercial life. Rather, it was intended to eliminate those who might stand in the way of a contemplated revolution -- thus underscoring the important role that lawyers can play in society.

(from Dickstein Shapiro Morin & Oshinsky LLP Firm Profile)

As the famous remark by the plotter of treachery in Shakespeare's King Henry VI shows - "The first thing we must do is kill all the lawyers," - the surest way to chaos and tyranny even then was to remove the guardians of independent thinking.
(from THINKING LIKE A LAWYER)

Remember were not the ones who got drunk and drove, we aren't the ones who beat your wife, we aren't the ones who made, sold or used the drugs, stole, lied or cheated. We aren't the ones who cheated on your spouse, built the cars which blew up on impact, didn't protect the child, or look after the employee. We are the ones who wrote the Constitution and the Bill of Rights, the Justinian Code and the Magna Carta, and count among our brotherhood Lincoln, Kennedy, and Ghandi. Even Moses had his counselor (remember his brother AARON )

We are who you run to when the world seems unjust, or you have screwed up, so all we ask is come up with some new material, we have been hearing the old Shakespeare stuff for centuries.

And you really want to know what we laugh about? We see inside your lives.

Having said all that...

Here are two a priest told me back in high school...

A lawyer and the pope die the same day, and go to heaven. St Peter escorts them to their living quarters, and the pope is given a small earthen cell, with a bench and a blanket for comfort. The lawyer is then taken to his home, and it is a glorous mansion, with gold faucets and a feather bed. The lawyer is embarrassed, and asks St Peter " why am I given great luxury while the pope gets such humble lodging...
St Peter replies, "we get lots of Popes up here, your our first lawyer"

John recently went in for a heart transplant, and the Dr told him he had a heart that had belonged to a mother of 6, only $10,000; or aheart of a farmer, only $15,000p; or the heart of a lawyer for $100,000. John asked why the heart of the lawyer was $100,000...The doctor replied, "that it had never been used".